Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '460f95ae7a2a253b9733a684b3f1b64ef2ef4507efb7b320325b9aa977ae46d6' 
  AND token = 'heH57aI7uIm8jAL6e7CEzXMu9LuEbhyGKbP67wX3Gko=' 
  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"
    }
  }
}