Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6779af0e9bbf67e4f13ced05c86e477f589cf016dded316d9bc31011b8caafb9' 
  AND token = '+K0j8JF7KJgWbn/wMxpld9BAxnK6nIPoUbfB7m049PY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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