SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44570395d179d988ceea3d4d3ce3fb5b42d9da2735a98f50f45b74f377335c34' 
  AND token = '9qQnZP5fw/WYqXkkKKaNITdqhmJAzOZI1OuAvQQU2nE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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