Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '333c44a5c92a7b2d1c4afbd6fcb11618705a4e68b169cbbe5ba509bd2d86bdc1' 
  AND token = 'JcGe1p+EE+Y+4WyrLzGfnD1Yf821NGnSaDtH8BfYI1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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