Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7afbdb5026574a6ec79b37dd631eb2d17c3a3b137e705d64adfaf6be09b4d98' 
  AND token = '6ipBHioGBOB7Gb6G3zd78ycQManWGglxrLwmVtWxte4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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