Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b6650207dfbf916ea07967a523e1bbda769f9c03509f1374d0fe93f4a6437f7' 
  AND token = 'FRmOdKJl91K6PMSW0xxt8+3LOKnUmKYDk+q4gKb2fsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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