Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c54f1dc1f3e832740a733a39b98e09a6a19d4e180e865834edf6f30ee777d83' 
  AND token = '7QDdX2pnsXAQo4XT7+FN9j2U5LjTsRJS49T7i3kUTB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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