Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8adb2327cab9f02c9cf7dc2be222a77661d02bf9a0977b07abd55805367aae7e' 
  AND token = 'AS301gAtCHVdXODYzHTozUzw+AeLMG0nDVqXPSIN5LM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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