Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4b62446affd4c158838a7256794d63e4231b2b12b85d96e9cbcf9de06ab59050' 
  AND token = 'DR8UYdKINRsWHUaHpfM/DBNkiLuXUUA1kEqE4REWBZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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