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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'ea992e7d5107f5e7d7e482db1f95d069a1f57c5557d0fc1c30ad636a99969b05' 
  AND token = 'OYtgUNi00MS3miRcFkajPC0C0/0lPPlQw1wrEdukOYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01741

JSON explain

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