Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'affff9fa954fc8f9dd3269bc228809b81aba7b71fdd99791bacb7e3a8bfd4729' 
  AND token = '1iyEwBpGhESghwgqNcW9rczydHQoj4YA023AF5bbuw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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