Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ea0c0bc4bf484e9a996692a5f53ca852dbe3dab98af7d8cefdfb649261ad6ba' 
  AND token = 'HALfACKmPe3fXwIJ9Ly7e/VF0tfRAWvwqPj/cTV01GA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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