Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e7d818c9d9349834e4b69302c7e483946a506cb3ed216ede84d18de9ad837c5' 
  AND token = 'NuMNcJf+tAGVK0AuyRL1pNHSp0MgZbfZxNucd06aSnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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