SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45ee275a4465a9b4a334182000b01b4a3ba0ff2c4c596075637538942bbd7222' 
  AND token = 'Bhd+f7m/2l7mLunPWUg8TR6UFsVCgGj5jZXHv00KBqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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