SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de1e27b44997d323e7f17fb40598054dc9b6a2a9726611d86a7a034681dee3b' 
  AND token = 'F2qHI1mScCqnFKQ+VtX+J3kG5iCgUa8EXwhxjsgCywQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00130

JSON explain

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