Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dcb69f81e0d31f7c602754c8e17c47e732fa26e688ae713f5afb811f298da0a' 
  AND token = '3yCTpeMtinkPk35jfhPb9ovrR1r6kihkpZNdzVR8JDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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