Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5a70dbad197bc8238899243f364aedd6b07a0086289ca4cfa6fa4955d498a4f' 
  AND token = 'Pf8aCtoX4WJjpcbD/U1q5s56fM+o2SJ5ea/KsKpD3Ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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