Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '275fe2403256f7b153f2f87dc516e76d795d27a078262fd8fc6221556874d1bf' 
  AND token = 'bbMRKDnBJ8nk10NpcKoWL01HYEn3LVyy8uG8cLKTUqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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