Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4b264e9c25df8a57baad6df27ece458e3ec70d39fc64538bb174f002a6c72c3' 
  AND token = 'OunVp2jZnQ63e/1Ls/d7rJAEmaYmlP+5U1+YNv+Iv8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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