Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ccbb1124ed498121c55bf4c65fb8aaa7e0ba4229388b043f7b360b640d8d6d1' 
  AND token = 'uSNMoSgnsuEfjDo+66WuUQ4pUvskCBXdBwh0ww1FzzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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