Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db7ae3d3b5bedc14cb3517f7e7b3d8d2e1a268b661fe1066cc83498655ec94c0' 
  AND token = 'LQ/yqdr9TnelT2bGZs3Jj+fIoMJolIhF3IRnU2PWtmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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