SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6e14987bd597b365463dfa0b4d056e967eabf9f55dce27f9fb705556b6659bdf' 
  AND token = 'AqZjUzNHR0mJJ1MKnLkOdf6K/Q6l/wqUkGL1AFfZkSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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