Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6c664d27a7d2cccab8447ecd03e4489b1fc3330ff621410fd4c57bdfdc8088c' 
  AND token = '6N7A3K383xSDkSPbSPYUzuu2pepHX89GmP40o4g/UyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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