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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c99933b0c5665bb75e3ba60769197200fa614865e6f5e73aae59f3a9aee6ac23' 
  AND token = 'oNPGsokY2NW5yk3cfAPwlUQrlEzOsSEsT3crO0LkKhg=' 
  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"
    }
  }
}