Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd44bc4581bfd8a0b0fcc5a353e282d91d4c84987006f07dfca0fd3c136788f65' 
  AND token = 'TuAwaXmDdmuwPZYXn9zFgfudIfofbp5XBU6T6nyuqhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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