SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6528720ddf06f0343ecdae7914e5acefb73274b5886d7f19933af6437985b3d9' 
  AND token = 'bIDhFr895u00WgtfIP+YYfNVVqyZKbD7hSMwFXogibA=' 
  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"
    }
  }
}