SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '90fac6d5c4c57e3db6d7e2aa33bf8d7af38b77426692fe724f0f9da681a63cb5' 
  AND token = 'YFBEDpU5NonrD/fAkyFqYI8gKPW8zVwgBqpEQW4fmZE=' 
  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"
    }
  }
}