Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '020f5f4fd3f7f8b9b37b5c548b50407a57fda20264fc7704bdbb7b9a8b2c5318' 
  AND token = '8sOBHSn3zhWLkAsnS0o5ZgNGHeVuqD/lirNSLDPKCm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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