Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd94adc4e1fb308a5032fc0e0a2003f2c80264d3b7cab567c4d8f473ccb2895cd' 
  AND token = 'fs02ulSrrq5klb2K7Rc1OkAV6guyMj2GwGvVlhTxeAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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