Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b146b8f644bf99bf3135855870029fe49db6e87efdd2d44a5138eab66180308' 
  AND token = 'oz7T0DPb3TFOJGQVMTNvC774yGFa0UiUrDo1qj/LXko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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