Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c1b990a411a3a396a57acc9da703f7ddca920e5b12db3cb4de4871adad20ae2' 
  AND token = 'EB9PRvkDvZicGLpS9HttJs5LqMAQqSIAi3Kba8jdE9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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