Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaa45eebc66d69d065ae116b0eb35e7f896fe43c7e69680dbab424835a7ad052' 
  AND token = 'M96PvL60562j3prXeQo9wxbXUT//0GCVfU0GWTIOHLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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