SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07490f6b7cc780eaa7c83529134244a9d5a04b2807f4a1751ba248b1d6473bb2' 
  AND token = 'gFEb1xdw8JY/NT3pnB16Xj9ZKcY+5sMfkKEBGyYK0l4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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