SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58de067ceae45ade34763e5de90b8de309b81e9bf38ebb67282c538d9fbf7fa7' 
  AND token = '/0V/+MjjR41PXI5JrCR/velm/A5yJJ6MC6FHK8BwM2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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