Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a429d08d92c6db0a159256e0eeb956a294c9d39e784aa05f8fd479909a0744e' 
  AND token = 'MAaMl4N0f1aIFOAiEfZdPOprbqhkocjQFEiTG3fvbXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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