Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5830590b45403c09fab60c268f3d6730ede370c2104275743e24175b67ea2b4' 
  AND token = '2wxtR6PuwBbVUdoydyGF5+sqq117+elvuvGbwXSMSCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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