Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dfffd49096e8b7478f4fe3289ae2b66fdea5ed9e394f14988c64f8f0fa0ae01' 
  AND token = 'B92UPWyxB47iJNrJo7OFTGmzybxwDMXCE8RolUXMtYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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