Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3fd9141bd34b038a2cb1a5a0d5bf901c97dc48200fd01226afcc4f3cce95141a' 
  AND token = 'L/7QGbLpocXEPfduKgQovtUyEmkdrvantwP6bP8tFW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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