Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea621cfe45df9e27b6dd9af429dc0491f0692bbcc4a7431745619bbc16f66c46' 
  AND token = '0odlyKEKSd8zg/uE89XQhBaq+/PHfLB2LKIyQtanAF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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