Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79e0782b54b0b9758a7d18e3c6bbccc00a9d7b2fe182b02a45ddfab9a8dc4310' 
  AND token = 'd2HfoAJibs8oemjG2gHDwxieRd4LKSS0hXDJdBx89OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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