Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac2bfc3dd5ec24d0b5e88c568a8a6b725f760e53b51ed5fd28c2b99745e98db9' 
  AND token = 'IBx6BORNncizcneEEyHy6ZKmJ+yHIDiYH9dSBxz5emA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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