Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89d581a38e9f02bff7ac786abdbc94dfab5d5964ebbcd7befc896d9dd175b684' 
  AND token = 'BRMsdb6WtT9eYBueUKc7p6xQyvZlVq9av2vjB93Uv8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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