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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '1ce5d164dd02ae2f21d7ce2356b0465cc11789617a54d2afce8c30c040489364' 
  AND token = 'S3FSw74Tm/d80UXzjoMV2QcdiuoVsdCbF/NsR+Kz1Dg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01602

JSON explain

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