Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1be17e85a3029d5e08bed9605e1c37e5b76b934a526a2331471cb65c996244f3' 
  AND token = 'hMEWA381esrc87kQVOHhoCn2m98nWXgCeP9vttt4Dbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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