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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '72056f6f4464c128b3d662ed4425b1e0e0235324f82d86abe51cd08a01049899' 
  AND token = 'KxZc459zujX7HzMRXYZs6uZVsy6OPn4H9yrhEz4r2C0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00946

JSON explain

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