Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c079f09262ee251abe7bd8b84381005152f8fc3be542243f252ba8156c5ea9c7' 
  AND token = '0zjFnGl5XWSs9cmPXLOal7ubJMZJW+QK3zacpoN9DBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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