Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '411d572d92e9f2158bb02dc44e26ed0addb7f3af7f76c292b06850e109304309' 
  AND token = '1oEduD2iUHSf3hCE7LySgOdPyrAPLrUhyahC6qbPmLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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