SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd741240e631b296f2c36d51a5a4fb062518ee127345398cdde37f679c787caa' 
  AND token = 'aCHq9Ya9DjpJ3G+Di4AWzoVkvSZabd8olWgBN+OCH1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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