Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f10d881cf730b0431d0c2e3f01da0f5686159a3d94f6cf2840625cd4cda5a0d' 
  AND token = '+O05OlKYuciTL6IL3Stof0S8JSObZmDgHIvO5XlGQn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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