Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18e9d3bc1ac235e9ea3d802a7c3df06ede6e40d96f44d1960c02916e766f8055' 
  AND token = 'BVJ33o28J9qfiBRzunyeHuKPmkLiHzFPSduLF82HZH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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