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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '602466b7004ef8a35669b8024ece9da9a2dc7372c2ff5c12253bf5a7932f5962' 
  AND token = '6M6mc5YXNUUCHJHi35s2wrFsdSmuJCaF93SyGM7yt0U=' 
  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"
    }
  }
}