Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce200bd9f8d8797446da9b0eae2d4866a01cc41c594d30d8acad8d19d7631150' 
  AND token = 'k1jSZjqQIcZMBVwTHQHZhDU2cA17AulTElg1s4tLoHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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