Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e56a4cd0b16c278fd1eded20651d59a24fcd0e263f7c5c790f00036c55be69c1' 
  AND token = 'xNF6yoMl7gqAijBuAcF5Y+mN9HTn4ukueY4LqHmqOOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}