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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'd57598a0347a2fc2c4fa735aff41ce0efe3ddb163bd3d01dccca0dfde167c224' 
  AND token = 'K/DzoiyK6r/awBGctGkDGa0UO4Xs61QenDuipYqBeRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01491

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}