Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e650f15f8ee164a54871f3e15bcaa7129bf0bfdeeb6edd9bbbbf23dc9b92de13' 
  AND token = 'DQjLIn7KUFYHJ7hKcb0KUAykkTUl/WrbIQXlbXaT6YA=' 
  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"
    }
  }
}