Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3949e2d7242eaa1f4f23b3277bfadc08736bd776465d059a1ca9ca8be5db6f5a' 
  AND token = 'iaXyFK1dznwGiOJb03/Bbdw8CNYXsYJN5TB8Lw98iu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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