Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31d0b3dad8068d563dac06ae574c51b598b6945e607a066813c9942c146a2750' 
  AND token = 'BaXN0qAZOtjRPs9XsPaW5zO8zeDbkoYfVSzxAxCaB4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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