Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0531ff091d5b75f6bce1ed7dc2682c64e0fa47be09e9a2c61fbac19f5c6c65f' 
  AND token = 'qDWTsMLxjbCwNs6PMnNxbrQvMEJQZZYU1L7GS882424=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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