Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e1960727b0e1e5253495b29a4c6249ec95a794e696cbc4a113b4a661859b8db' 
  AND token = 'N/A52gcaFjuSMfr1bFv7VBSN60eAmJRHt+AYDu6SkFg=' 
  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"
    }
  }
}