Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'caab97dfdd1db8b2e9702b70c0f6175e949631f6b9689e22a55927300e3bb866' 
  AND token = '1YOo/w6IIepUhMFtHNQuPQXb0+9wN1+Pn32qdDYMeIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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