Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f4f4166141333b4c72b70be4b1ef8179d18e70490cc1b815f4881a42f1d6c4de' 
  AND token = 'WOosfhJ14VqMx3mNepaa4rYopKEOJqkmPxUTBgstZqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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