Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b3d114a81c6337149e028d3a07ca7c2568512033dc80b78cdeec0abaa6ba687' 
  AND token = 'Iho6AOW97rLZ5qQd+pHgH5QZN1sqnCcVSEViRIA4iUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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