Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e53623bca8f79e462546d43db254292fba8f546187444560aa0a3fe7b8ea6d08' 
  AND token = 'uVjgja7L6INHd7MDGAv7Icr2chhCIuNp2TEiMNY36D8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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