Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82495f328ddee12a6dfb56084e175c669f066f822ecc6c950e66f84fe5a60acd' 
  AND token = '99o7kccYAi+fMhUFG2X7GR8QRaE75CMPB7vNgCqHE8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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