Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f0ee7c7fb55a58e1338d01dd88942a1213858b6b3835364e8a2b86d1c9cff21' 
  AND token = 'KHGvVRSA5dIlf7J/nRC9U3YoMt1Vey/pWL1YKzW8OHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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