Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9abfb1f3a3412780b34ace2e63bdf6243bcbed5beb609c7807d622e37a526dc' 
  AND token = 'l36c/X+tvK1uI1SLo4UK71LG9+RRz/zzke+hmVc++Ls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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