Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f580b5f108d30bbc73ccf15dea86a28380eebde3536c061f0445c7e8fef117b' 
  AND token = '+hqsXZ8+c7f6hObpVTyADb+OmoVVFLqUcwTXfFsZMyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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