Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '888032df8f80d361e3eb4f8c24a1711b3023e14b8fddd9251569226dfa8ab4b1' 
  AND token = '4Hja0hgqN2o11dQn4ZqoziMn68eJDwS2jyyWgOMzsOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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