Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a27f857e62e374b5bfd58bb1bc54525d8ce63ebb652c3c2aaa2994146eed4f29' 
  AND token = 'I1Aju4E8WOJECxp8dSAzLfzoqYoVbBITAQt5TpPKcQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}