Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bd370d349712a6e9c047ca4b0c990e038dcaff84f397ef7303ced7ffcb43148' 
  AND token = 'CYd5x05b+BtEvHI86DlEqs5XKONa/A5ZilXQX+fcWok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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