Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'cc64529d1e8da45db880b7a21b0d066137d4026ab34dc7089644b95b0c09a18b' 
  AND token = '6S3J9CH5QcgkigtvqS4TrnpLBAyglMM4+vSDqPH2+k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01473

JSON explain

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