Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd37e79a89a31a5c6005090a591ffb1323f8a63b24dc5c491523f47501e7e11a0' 
  AND token = 'NzUn9cpyZSCyxtxlFlrkHW6MHjXTS1E4gUAHubYCmc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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