Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04957661f1d387fe491fc85975577bb1961a41a333601668a4b099a5d9862caa' 
  AND token = 'eaBGu1XXtEZXEgR+mtC9XTlsQHezij98hcRcXascp3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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