Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b39e95b6144efadfe7dae569811f911608eeab9ea98244c63e89bb460047d9c4' 
  AND token = 'T4pgpiE3mw4qVH8ueK1YG6yPGrnQc6rLMYbfdEuhz5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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