Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bc3a07a47232bbbba144adecbbef1911b66e007923609ad95975329a449eb30' 
  AND token = 'JAGA8NMbIF19oRlV2g8vOI+/rX6tDcEUEfAoYnwTdYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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