Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b667cfeed6307faab5214399d72e5f789f498dc6cffd5eaa45f9f5edeaaab89c' 
  AND token = 'knaudZxo6GW36YehQtYEqqBHhFRIDBwzYCK3brQllhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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