Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04dcad33f69e1da952b89296b15a85ec4e84c04fd6b6d18234e7f23bd913a947' 
  AND token = '9DbQOMXG0EEnugUGD9oFWv6xQjre0fBv3g0/of+/dHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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