SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5527c2354fe0c87f6b41da05766774a724fa14312e1d9b379d35f1f3f43f781e' 
  AND token = 'jAPXWgpwZZxcYwJmA1hQ/ate+uMkzDcGoTmj+ROJsyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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