Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bea73d0894bd7f7b8c90f821122f4c72dcd3cbf940ad4626c56dee9f4518a78d' 
  AND token = 'ycRdvPPERGy09jvUWsmYtwlAQHXCgpUMAZxgqvNdP2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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