Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32596959bd3e33ab8edb822c5dbf8370cf40d3e1f3c803e0d4232365ba2c1b1a' 
  AND token = 'tbBroy9a8aYqoM/+iWVpkma0a8IAUTtP+7Y1Qq0UdEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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