Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbebc9527dde9d36eadf8016ae1ce384c73666c3f127748fd7b34c6aad7b0d7e' 
  AND token = 'ZPGFl8QW/0y5NfkpLWxynXXS3F3N20lr6T04c2QJLNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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