Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '484a83e7a5658220f4b9d58bc38b1eead27caba71722dabe1cb15f866984ca2e' 
  AND token = 'LavrD5ono8oDLyaxa5xvX/rzZhqUAdR2bxYPRsZGgmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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