SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '715bce7e1aacaf903ed3fe832f3120a456ee2b6a289f7d561ad4c6791a4343f2' 
  AND token = 'RQd6JhDocRKzRoHBC5HPuXBf8lCr+BnKbhs1GwDW54U=' 
  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"
    }
  }
}