Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d35b201de763dad59509bb0f65f84b59d6b74a79010f85526da842082602390' 
  AND token = '7AHFyCUcqRabtvTJ8nAdaDrSfojT87Y3B1ziMBOhodQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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