Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aaf89398c4a29ac552a490a78ac6a8d7f7a5d586829dc8e772b374b24f9e6a0' 
  AND token = 'LG1+xVlzUEXHc7ypfnDNMN1rClkhTbhRzczCCDb1Kkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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