Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fa44d27faefa44599d96c04a86dff5cfe694935884d77f0b65ff729bf2c3de2' 
  AND token = '/En+aQ/Syv+X6c0p2MXRm2Xfu8lViub+c4P41PqlyQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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