SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'df926fc782aaa01c074245622259dd91937d5e7a540bb96392a233700b457baf' 
  AND token = 'wyovDTu9BP1IjDTqXkfEexKZ5PLTE7mzP+PcgAYfY8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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