Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74e1a1868e800d18a66641c20f4247464a3dd4acedc9c8efb7bfc568a1afeb97' 
  AND token = 'sjYcEbPJTRnWSsu8lVZLPkYEqUNWTq9rEh3KpnyHUUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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