Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5f4d228c9a9ef728f81f300a5e505b79b758f7374e4d9a1040839bd9646135c' 
  AND token = 'AEbzl0v3w16JbP3r45WGnaNBMQY7GajFQcuvjaBzNPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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