Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2186c8a7bda835b07a81fce035ccaf1f468aa85010b615143bf2f3c5a149b5da' 
  AND token = '2yrFgm2T0crVKOGYy3LjIQ+IqnAhpA+ewprDL1zjXrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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