Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1cd54cb24ad92ddebd6b8c7e86090e085b57e5259cf10faa17d4df05ecb110ad' 
  AND token = '7Lwdx5nmziTwtc3Mb6p4Bgs+Qns29Wg9vCMyjw9Yc4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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