SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '27bd5ff4ff4551cf739188a4c546cc50d6b68b228678742beba8ddbe59c3463d' 
  AND token = 'sizU9LX1sRmFBrCp+4+BeGnoN+xuH45VKa2WbJXCZkc=' 
  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"
    }
  }
}