Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02c43522170a2442f262a0fa7af804a203e842193af4a41777d7796fe1edbf5c' 
  AND token = 'Gs79geHbZ/L3XvRMtRh0bBk19VvfV2mSv2FtnHR0EiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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