Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da0185c5ab5f5b15e747f1f95e164f6339809cf50f918eea331cb3c65945350b' 
  AND token = 'qXVGyMCz+EgrQNLrO2YoCEpNmhYFPIudcVU6cfzgQe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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