Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f378f24c07bd342ec7fc77e79d5c9c2a53166ff9f8755655180daed77cefa005' 
  AND token = 'qoJ2NdZIPQeVF5CguZllaH3cNyMrFQ9TpFN6nGNHdfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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