Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15061d28182e897a6fb355b83e6d0c5936e87443f1e1476e38a5a7c7cb9c1d50' 
  AND token = 'pCFu10dy6Tb8QxeJj7zuUzd54KmGEioR1fiBDcTKUZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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