Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f863bea19d82ed28399503c30608d59b4e30283bc50f29b84783423fd2fbd45' 
  AND token = 'v5QsJ+xo1z9hOOThebaSuYFMQsfpIL1STXIN80ucgdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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