Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '604dd7aeb3e0fe73134d0ff5f0244e06d9b2e2149c273b86cf21f6aa80aed1fe' 
  AND token = '0yDr649Qk8gUui7qXawgUEtssMAlAXBHtiq54sY1HEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}