Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '188cfedba02377507b1c005baaa2f72faeff2d524fec1aa75b56191d455cdb79' 
  AND token = 'a73SZkc1h/nsmJHW6Lwm1/SudqycUAb5r/ILBRtmZzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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