SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '3d9de3e57bbd17fc4a96369e563be759e378c3f19b72fa802fcc11c39f188ec6' 
  AND token = 'GP0UyfGfT0spcbD8h8viw6xrsSxkBY6Z1PpVghzhBhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}