Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b4e69249c39f7ed85a9b5916f10b4fdc55341386722756e996c14deb2b5d13a' 
  AND token = 'aZK+JKM6nH8+MbiCpgVNVf6PR92K81N6nsguNR0VQSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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