Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df75906326fbe023f39a1bc54822ad68260643616eeb802492679390f6f9ee49' 
  AND token = '8BGkq5YN9m7icTBNRi9DEmavZpE+6hKqN5Ju1gtn5wA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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