Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da0c81f08524011ccb3b2fa16b98d40ec502547c6b9f5e8605d93922e2fb8b9c' 
  AND token = 'q1gULgLxbLJrQdHcC40Vaf9t0zOvNY9T6YBdSCRckDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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