Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2cdd35898cc5268f8b0440bbbf614dbcf6d77f4321a9d0bc0f050c4120741ebf' 
  AND token = 'xWf5s8hoGeI0rxK0dF+fvgTzbE5NcU9iwkxZwUDcPoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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