Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '104805dc3e3f045584ed15e849303ecdb07dcc41d4504acea06caddb16023988' 
  AND token = 'VeaYn4vl0C2yzz3BWFHY6fuZedhp153kQMOXH2V38Mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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