Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9533aa3dbc5b3821d47c1cf8ced7b324e26881986bdc1d446f58d58e86fd1733' 
  AND token = 'LRZIq+8nxei38/kP8ynQjXU42xRfPMkF576zFzYgejg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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