Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f595f9f95a7f8fc712986baba5570c0031fb05b6d6dd25c83d06f0cb274907f' 
  AND token = 'Aft+0vnLzYjLkIcIhzY6XlykumEZL8jtihIdOr3wbbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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