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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3734b23f2f7cab90909e1a498e6af1302aa8db40e7f9d7211cd64cc16d850e93' 
  AND token = 'bwDG6Y0KNZgbGJsu5fOsP7TbxGbE19LHcbJ95PRIk/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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