Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efe28b17c1046d8f17cf01d180efd62c92a9c56ebcb4e9beec3000a17810ef94' 
  AND token = 'TLcAjFX7PSe0TDFyQSjd8dRfBy/AXKYPp6a6dLQyJnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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