SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ddffca7e357c000b9d34b48f33dacfc98522545ca30ef099a9114c5291a0673' 
  AND token = 'oivFKJ1xV0UzWBSxhyKpJnhEbXLGYa4+UHQLLRH3lFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}