Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbc2ea0eba176b03256ce4330765e2a83cdecd77a9d0a6f759b84d5c70507847' 
  AND token = 'NINptiLBzD9TBzyLTYgVM0D0Nesl8lm225RAv45QfhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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