Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cfe67b81fd33bc72e9d8a79ac6fb37b790ecb12c6bd2d7f1883e03ebe905326' 
  AND token = '0WcWwZ1PTb+OMKyRV/u/vxaC7fDlC4aTd4IMutPEZfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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