Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1caef2c809c35898a1b5a99a69386c21c806d0d911aca4d2b972a79589f4a33d' 
  AND token = 'dRKd5ybopvFODdZokTACBt3tPSJsCpUOTzsRQLQLHbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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