Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '578d2ce82661e1d3441c0d5db418a51722026c98fcb76f7af7147698cda04ef3' 
  AND token = 'ScZxBfNGP8+1cq2fo2Ty9nr4VjoQf+pxrZhfBC/PsYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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