Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b02697736d054175ad0aa2d53ce71a0201597e85f4f051d0458fbed885751201' 
  AND token = 'JBVtoy93NFekXGi22UiIvY0k6+Y7cMnobeO1ereWVpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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