Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f2340e77f668a6c9a814b35593f7e764fccbce3258e339fb03f7866551891f1' 
  AND token = 'eQcEPs5vAOutYMsdm562h4SrmsPzrsgUyLsEulumWBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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